29 results about "Dioptric correction" patented technology

The utility model discloses a myopia prevention and control lens capable of realizing eyesight fogging, which comprises a lens first refraction part and a lens second refraction part, the lens first refraction part is a lens center refraction correction visual area, the periphery of the lens first refraction part is the lens second refraction part, and the lens second refraction part is a lens center refraction correction visual area. The second refraction part of the lens is provided with a plurality of micro-lenses which are arranged according to the Fibonacci sequence and the Fermat spiral to form an atomization function area, so that the plurality of micro-lenses are arranged according to the Fibonacci sequence and the Fermat spiral, and the distance between any two micro-lenses is equal, so that the lens has excellent natural aesthetic characteristics; therefore, the coverage area of the micro lenses can be uniform and consistent in unit area, large use difference possibly brought by tiny optical deviation is avoided, and the problem that the effect of wearing out-of-focus glasses is relatively reduced possibly in the long-term use process of children in the vision growth period is ensured.

The invention relates to an ophthalmic lens element (1) intended to be worn by a wearer, comprising: at least one prescription portion (2) having a first optical function configured to provide, when the lens element (1) is worn by the wearer, a refractive correction of the wearer's eye based on the wearer's prescription; and a plurality of lenslets (3), each lenslet (3) of said plurality of lenslets being configured to provide at least one second optical function different from the first optical function, wherein each lenslet (3) has a shape, a size and a position such that at least a portion of said lens element (1) has a modulation transfer function (MTF) whose values are configured such that the modulation transfer function of said lens element (1) is lower than or equal to 0.6 in a spatial frequency range comprised between 1 and 5 cycles per degree.

The invention relates to the technical field of refraction correction, in particular to a myopia control lens design method based on a heterogeneous scattering unit array, which comprises the following steps of: acquiring an eye axis length, a corneal curvature and a pupil diameter, calculating an incidence characteristic and a visual axis reference value, dividing functional areas according to an arrangement relationship between the incidence characteristic and a micro lens, and calculating a myopia control lens array; the method comprises the steps of building a coordinate index, analyzing structure parameter differences, reading parameters, calculating regulation and control characteristic values, and mapping array coordinates to generate a manufacturing instruction sequence. According to the structure arrangement and main visual axis relation, dividing functional sections, improving the matching degree of the area visual function, introducing a structure difference recognition and fine adjustment mechanism, improving the structure adjustment precision, and improving the manufacturing accuracy. The optical path control capability is enhanced, parameters are mapped into manufacturing instructions, the structure execution accuracy is ensured, the processing consistency is improved, closed-loop optimization from parameter acquisition, structure regulation and control to manufacturing instruction generation is integrally realized, the coupling of a visual intervention structure and functions is enhanced, and the stability and continuity of a correction effect are improved.

The application discloses a kind of corrective lens design equipment, storage medium and lens, it is related to medical equipment field, for solving the problem of existing refractive correction improves visual acuity or the effect of improving visual quality is poor.Refractive lens design equipment includes acquisition device, selection device and design device, acquisition device obtains the central refractive power of target individual eyeball, selection device finds out target refractive topography from refractive topography group, central refractive power is in the central refractive power range corresponding to target refractive topography, and refractive topography describes the retinal refractive power distribution of eyeball with corresponding central refractive power in preset field angle;Design device obtains refractive power distribution correction scheme in conjunction with target refractive topography, to obtain the corrective lens for target individual.The present application combines the peripheral defocus characteristics of human eye retina to design semi-personalized lens for individual, to achieve the purpose of improving visual acuity, improving myopia prevention and control effect or improving peripheral visual quality.

To provide an extended depth of focus (EDOF) that provides a cataract patient with continuous vision from distance to near with minimal halo and glare, and an intraocular lens (IOL) that achieves continuous vision.SOLUTION: To obtain continuous vision from a long distance to a short distance near 40-35cm by providing the extension of a focal depth. The spherical aberration of each zone of the anterior surface of the intraocular lens is optimized to minimize halo and glare. The fourth zone 60 degree segment design of the present invention provides a balanced energy distribution at large pupil diameters and makes the lens pupil independent of power distribution. The lens power and its extended depth of focus are independent of pupil size and lighting conditions. Furthermore, the change of zone of the intraocular lens can be used as a controllable switch to change the depth of focus according to the demand from far vision to near vision or from far vision to intermediate vision.SELECTED DRAWING: Figure 1

The utility model relates to a kind of glasses, specifically discloses a kind of moisturizing glasses, including glasses main body, the glasses main body includes frame and the lens assembly of being set in frame;The lens assembly includes flat light mirror and dioptric mirror, the dioptric mirror is detachable, for correcting eyesight;The moisturizing release buffer is equipped in the frame inside, for continuously releasing humid gas to eye portion;Frame both sides are connected with headband, adjusting buckle is equipped on the headband, for adjusting wearing tightness;Assembly block is inserted in the recess on the frame, reflective plate is fixed on the assembly block by screw;Limiting mechanism for limiting the assembly block is set on the frame. The moisturizing glasses provided in the scheme can realize eye moisturizing and dioptric correction simultaneously.

In the method according to the application, the optical system (2) switches from a first dioptric power state to a second dioptric power state to provide a first dioptric correction and a second dioptric correction to the eye (4) of the subject, said switching being performed without interrupting the light beam (6) coming from the target object (7) and transmitted by the optical system to the eye of the subject. Said switching is performed so as to bypass an intermediate dioptric correction between said first and second dioptric corrections, or at a speed higher than a given limit. The application also relates to an associated instrument (1).

Intraocular implants and methods of making intraocular implants are provided. The intraocular implants can improve the vision of a patient, such as by increasing the depth of focus of an eye of a patient. In particular, the intraocular implants can include a mask having an annular portion with a relatively low visible light transmission surrounding a relatively high transmission central portion such as a clear lens or aperture. This construct is adapted to provide an annular mask with a small aperture for light to pass through to the retina to increase depth of focus. The intraocular implant may have an optical power for refractive correction. The intraocular implant may be implanted in any location along the optical pathway in the eye, e.g., as an implant in the anterior or posterior chamber.

An optical lens for vision correction adapted to correct a diopter value of N of an eye of a subject includes a vision correction area. The vision correction area includes an optical center, a first diopter correction portion, and a second diopter correction portion. The optical center is for aligning with a visual axis of the eye of the subject. The first diopter correction portion outwardly extends from the optical center and has a diopter value gradually decreasing from the optical center to a periphery of the first diopter correction portion. The optical center has a maximum diopter value ranging from N+3.5 D to N+9 D. The periphery of the first diopter correction portion has a diopter value of N. The second diopter correction portion surrounds and adjoins the first diopter correction portion, and has a diopter value constantly varying within a range from N−1.5 D to N+1 D.

The present disclosure concerns a testing device (500) comprising: a light-field projector display (100) sequentially emitting a plurality of light fields (101); a spatial light modulator (SLM) (3) controllable to modulate the light fields (101); projection optics (4) configured to project the modulated light fields (101) and form at least a virtual image (40) in a projection image plane (400); and wherein the SLM image pattern (61) is configured to add at least one refractive correction to said at least one virtual image (40). A human interface device (HID) (503) is configured to let a user select at least one of the virtual images (40) for which the user perceives as having the best image subjective quality input the refractive correction corresponding to the selected at least one of the virtual images (40) in a data storage unit (509). The present disclosure further concerns a computer-readable medium configured to perform a method for to assess the vision acuity of a user by using the testing device.

The invention provides an AI digital lens generation method and system based on a 3D eyeball digital model. The method comprises the following steps: acquiring original parameter data of a to-be-detected eyeball by utilizing multi-modal scanning; constructing a 3D eyeball digital model by using the original parameter data, inputting the 3D eyeball digital model into a pre-trained joint network, and extracting eyeball refraction parameters and an eight-order Zernike high-order aberration coefficient; inputting a collaborative design model of a generative adversarial network GAN and a multi-target non-sorting genetic algorithm NSGA-II by taking the eyeball refraction parameter and the high-order aberration coefficient as generative conditions, and determining an optimal lens free-form surface height map; and based on the optimal lens free-form surface height map, digital lens production is controlled through computer-aided manufacturing (CAM), and virtual try-on verification is performed in combination with an augmented reality (AR) technology. The technical problems that traditional refraction correction precision is insufficient and high-order aberration cannot be effectively compensated are fundamentally solved.

The invention discloses a lens based on augmented reality, belongs to the technical field of augmented reality near-to-eye display, and mainly solves the problems of heavy system, large assembly error and optical performance damage caused by split implementation of waveguide display and refraction correction functions in the prior art. According to the lens, the low-refractive-index layer, the high-refractive-index waveguide layer and the diffraction grating structure are directly constructed on the refractive lens, light rays are controlled to be transmitted in the waveguide layer in a total reflection mode, are diffracted by the grating and then penetrate through all the layers to enter human eyes, and the monolithic integration design is achieved. The lens is mainly used in augmented reality equipment, has a vision correction function while providing virtual image display, and is suitable for user groups needing to wear correction lenses.

An ophthalmic device satisfying a prescription for at least one power correction for a wearer, a method for manufacturing the ophthalmic device, and a method for applying a semi-finished hybrid ophthalmic lens. The ophthalmic device includes at least one electro-active cell which includes a rear shell and a front shell defining a backside surface and an opposite front surface, the shells being provided with transparent electrodes and delimiting a sealed cavity. The rear shell derives from a semi-finished hybrid ophthalmic lens including a front mineral part having a first mineral face proximal to the front shell and a second mineral face opposite to the first mineral face, and a rear plastic part attached to the front mineral part.

The application provides a myopia control contact lens, comprising a lens body, wherein a dioptric correction area is arranged on the lens body, a central clear area is arranged in the middle of the dioptric correction area, a central enhancement induction area is arranged in the middle of the central clear area, a plurality of point diffusion areas and at least one focal ring with a defocus amount distribution are arranged on the periphery of the central clear area. According to the application, the focal ring and the central enhancement induction area form a point focal ring in front of the retina, and the influence on visual acuity is minimal when the myopia control adjustment is normally carried out through optical defocus; and while the myopia control is carried out through defocus, the point diffusion area can change the scattering of light, thereby reducing the contrast of image imaging, the lens adjusts the contrast and the visual signal of optical defocus through the defocus area and the point diffusion area to delay the increase of the axial length, thereby achieving a better myopia control effect.

The utility model relates to a myopia prevention and control out-of-focus film which comprises a film main body, and the film main body is adhered to one side, back on to eyes, of a spectacle lens; a multifunctional area is arranged in the middle of the membrane main body; the multifunctional area comprises a refraction correction area and a multifunctional prevention and control area; the refraction correction area is located in the center of the film body, and the multifunctional prevention and control area surrounds the refraction correction area. The multifunctional prevention and control area comprises a positive defocus area, a negative defocus area and two low-contrast areas; the positive defocus area and the negative defocus area are located on the two sides of the refraction correction area, and the two low-contrast areas are located at the upper position and the lower position of the refraction correction area respectively. And the areas of the positive defocus region, the negative defocus region and the low-contrast region are the same. The myopia prevention and control device has the advantages that the refraction correction area and the multifunctional prevention and control area work cooperatively, the myopia prevention and control effect is greatly improved, the adjusting burden of eyes is relieved, the myopia deepening risk caused by long-time close-range eye using can be reduced, and the double purposes of vision correction and myopia prevention and control are achieved.

The application discloses a kind of unaccommodated contact lens lenses, including lens body, the lens body is provided with optical area, the middle part of the optical area is provided with dioptric correction area, the outer periphery of the dioptric correction area is provided with first defocus ring, the outer periphery of the first defocus ring is provided with second defocus ring, the defocus amount of the second defocus ring is greater than the defocus amount of the first defocus ring, and the defocus amount of the first defocus ring and the second defocus ring changes in radial direction.Compared with prior art, in the technical scheme of the application, by setting the defocus amount of the first defocus ring and the second defocus ring to be variable, when blinking, the lens body will move, so that the defocus amount of the area corresponding to the original position of the eyeball changes, so that the brain cannot clearly identify the peripheral imaging, that is, the effect of inhibiting the growth of the eye axis can be maintained, so that longer-term myopia control effect is achieved.

The invention relates to the technical field of intelligent wearable equipment and visual health, and discloses intelligent far-image glasses and a visual health care method. The glasses comprise a glasses frame, a far-image optical module integrated in the frame, and a magnetic refraction correction module. The refraction correction module is located in a light emitting path of the far image optical module and detachably installed on the magnetic attraction base on the inner side of the lens frame through magnetic force. Through product form optimization and function reconstruction integration, passive watching is changed into active intervention, healthy eye use becomes a natural, convenient and non-inductive daily behavior, and meanwhile comfort and stability in various use scenes are ensured.

This invention belongs to the field of smart glasses technology, specifically relating to a magnetic lens structure for smart glasses. It includes a glasses body and an adjustable nose pad assembly connected to the glasses body. A refractive lens assembly is detachably connected to the nose pad assembly, allowing the refractive lens assembly to move synchronously with the adjustment of the nose pad assembly. By directly mounting the refractive lens assembly to the nose pad assembly, this invention ensures that when the nose pad assembly is adjusted, the refractive lens assembly moves with the nose pad assembly, rather than with the smart glasses body, thus maintaining the interpupillary distance of the refractive lens and improving wearing comfort.

The utility model provides a photochromic optical path difference regulation structure lens, which relates to the field of optical lenses, and comprises a lens piece, the lens piece is suitable for refraction correction, the lens piece comprises an optical path difference regulation area, and the optical path difference regulation area is suitable for generating various optical signals including defocus signals so as to prevent and control myopia; and the composite functional area is suitable for adjusting the color of the lens. According to the myopia prevention and control lens, color change of the myopia prevention and control lens is realized by arranging the photochromic composite functional region, and the refractive index change generated by photochromic is dynamically offset by the optical compensation region arranged in the composite functional region, so that interference of the refractive index change on optical signals such as defocus signals in the photochromic process is avoided; the stability of the myopia prevention and control effect is ensured; the optical path difference regulation and control area integrates various optical signals, provides additional prevention and control means for people who are not sensitive to single out-of-focus signals, and achieves a better myopia prevention and control effect.

A refraction-corrective lens detection method and an electronic device. The method comprises: when it is detected that a head-mounted display device is worn, photographing in a direction towards the eye on the basis of a photographing assembly, to obtain an eye image; matching edge information of an eye region in the eye image with preset edge information, the preset edge information being edge information of an eye region in a reference eye image, and the reference eye image being obtained by photographing on the basis of the photographing assembly in the direction of the eye when the head-mounted display device is not provided with a refraction-corrective lens; if the edge information does not match the preset edge information, determining that the head-mounted display device is currently provided with a refraction corrective lens.

This invention discloses an AR display device, including a projection optical engine and a waveguide element. The waveguide element has an input facet that is inclined relative to the plane of the waveguide element. The output end of the waveguide element is provided with an output diffraction element parallel to the plane of the waveguide element, wherein the output diffraction element has optical power. The output end of the waveguide element also has a deflecting optical element. The projection optical engine outputs a projection beam to the input facet, causing the projection beam to undergo total internal reflection within the waveguide element. After being deflected by the deflecting optical element, the projection beam is incident on the output diffraction element with its principal ray perpendicular to the principal ray, and then diffracted by the output diffraction element in a direction perpendicular to the principal ray. This AR display device, while possessing a large field of view or refractive correction function, reduces the distortion of the projected image formed by the projection beam, improving the display effect and user experience.

The invention relates to the technical field of visual training, in particular to a visual training device and a visual training method. Comprising a lower shell, a box body is arranged in the lower shell, mirror reflection lenses are arranged on the front side and the rear side in the box body, a training assembly is arranged at the bottom of the box body, a plurality of training dolls are arranged at the top in the box body at intervals, a box body cover is arranged on the box body, and a full-spectrum lamp strip is arranged at the bottom of the box body cover. A flexible glue visual window is arranged on the front side of the lower shell, a diopter-adjustable refraction correction lens is arranged in the flexible glue visual window, and an upper shell is arranged on the top of the lower shell. During training, a doll extending infinitely is created through front and rear mirror reflection lenses in the box body, so that a user sees the doll which is always slightly fuzzy to achieve a micro-fog state, target identification and confirmation are facilitated, the user focuses a correct target, difficulty is dynamically adjusted through a distance monitoring and feedback mechanism, the optimal effect is achieved, and the user experience is improved. And data can be recorded in real time and timely reminded, so that continuous and effective training is ensured.

The application provides a lens module and a wearable device. The lens module comprises a first lens assembly having a first surface, a curvature of the first surface being adjustable so that an astigmatism power of the first lens assembly is adjustable; and a second lens assembly disposed on a side of the first lens assembly away from the first surface, the second lens assembly having a second surface away from the first lens assembly, a curvature of the second surface being adjustable so that a myopia or hyperopia power of the second lens assembly is adjustable. The myopia or hyperopia power of the lens module of the embodiment of the application is adjustable and the astigmatism power is also adjustable, which can be suitable for the refractive correction of users with different myopia, hyperopia and astigmatism powers.